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A kind of anti-corrosion method of rare earth alloy coating for grounding grid protection

A rare earth alloy and coating anti-corrosion technology, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of grounding grid material corrosion and poor coating protection ability, so as to improve the corrosion resistance life and reduce the Effect of thin plating thickness and improved corrosion resistance

Inactive Publication Date: 2017-06-09
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the current situation of serious corrosion of grounding grid materials and poor protection ability of existing coatings, and to reflect the superiority of rare earth-containing aluminum-zinc alloy anti-corrosion coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) A group of elements is selected according to the formula. According to the weight percentage of the elements, the composition ratio of the adhesive primer is Ni: 60, Al: 30, Zn: 9, Fe: 1. The total amount of prepared primer is 500kg, then the weight of each material required is calculated as follows: Ni: 300kg, Al: 150kg, Zn: 45kg, Fe: 5kg. The composition ratio of the functional surface coating is Zn: 30, Ni: 10, Mn: 0.5, Si: 0.1, Cr: 0.1, Ti: 1, Be: 0.03, rare earth additives La: 0.7, Ce: 0.2, Pr: 0.5, Er: 1.6, the balance being Al. The total amount of prepared surface coating is 1000kg, then the weight of each material required is calculated as Zn: 300kg, Ni: 100kg, Mn: 5kg, Si: 1kg, Cr: 1kg, Ti: 10kg, Be: 0.3kg , La: 7kg, Ce: 2kg, Pr: 5kg, Er: 16kg, Al: 552.7kg.

[0017] (2) First add aluminum ingots or molten aluminum into the melting furnace, heat it to melt it completely and keep it warm at 800°C. Then add trace elements according to the proportion of the ...

Embodiment 2

[0022] (1) A group of elements is selected according to the formula. According to the weight percentage of the elements, the composition ratio of the adhesive primer is Ni: 57, Al: 28, Zn: 13, Fe: 2. The total amount of prepared primer is 500kg, then the weight of each material required is calculated as follows: Ni: 285kg, Al: 140kg, Zn: 65kg, Fe: 10kg. The composition ratio of the functional surface coating is Zn: 35, Ni: 15, Mn: 0.78, Si: 0.5, Cr: 0.15, Ti: 0.85, Be: 0.04, rare earth additive La: 0.3, Ce: 0.15:, Nd: 0.9 , Sc: 0.65, the balance being Al. The total amount of prepared surface coating is 1000kg, then the weight of each material required is calculated as Zn: 350kg, Ni: 150kg, Mn: 7.8kg, Si: 5kg, Cr: 1.5kg, Ti: 8.5kg, Be : 0.4kg, La: 3kg, Ce: 1.5kg, Nd: 9kg, Sc: 6.5kg, Al: 456.8kg.

[0023] (2) First add aluminum ingots or molten aluminum into the melting furnace, heat it to melt it completely and keep it warm at 750°C. Then add trace elements according to the ...

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Abstract

The invention discloses a corrosion prevention method of a rare earth-containing alloy coating used for ground net protection, and relates to the conductive coating corrosion prevention field, according to the method, plasma spraying technology is used, carbon steel is used as a ground net material, and the ground net surface is successively sprayed with a cohesive bottom layer with the thickness of 60-100 microns and a lanthanum, cerium, praseodymium, neodymium and other rare earth-containing functional alloy surface layer with the thickness of 150-200 microns. The method comprises the following steps: (1) purification decontamination and sandblasting processing of the ground net surface; (2) allocation of lanthanum, cerium, praseodymium, neodymium and other rare earth-containing alloy powder in zinc, aluminum, magnesium, nickel, manganese, silicon, chromium, beryllium and titanium alloy powder of a surface layer coating; and (3) formation of the rare earth-containing alloy corrosion prevention coating. The electric power ground net surface is sprayed with the rare earth-containing alloy corrosion prevention coating, so that the ground net service life is improved, the ground net work cost is reduced, and the method is simple and reliable in process, green, low-carbon, non-pollution, and friendly to environment.

Description

technical field [0001] The invention relates to the field of conductive coating anticorrosion, more specifically, the invention relates to a method for anticorrosion of a rare earth alloy coating used for grounding grid protection. Background technique [0002] With the development of the economy and the progress of the times, people's requirements for the power system are getting higher and higher. In recent years, the power system has been continuously developed in the direction of ultra-high voltage, large capacity and long distance. The grounding system is the basic guarantee for the safe operation of the power grid, and its importance is becoming more and more prominent. The grounding system is a channel for the discharge of power generation and substations. It mainly has three protective functions: working grounding, ensuring the normal operation of the power system and discharging fault current; protective grounding, protecting personnel from leakage current electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/06C23C4/08C22C19/03C22C30/06C22C21/10C22C32/00
Inventor 杜鹏裴锋田旭罗有国徐天福廖靖郜友彬刘光明李多生蒋磊郭淑琴
Owner STATE GRID CORP OF CHINA
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